Valka (pronunciationⓘ; German: Walk) is a town and municipality in the Vidzeme region of Latvia, on the border with Estonia along both banks of the river Pedele.

The border dividing the Livonian town of Walk was marked out in 1920 by an international jury headed by British Colonel Stephen George Tallents.

With the expansion of the Schengen Agreement and abolition of the Estonian/Latvian border in 2007, it was announced that common public bus transport would be established between Valka and Valga.

Furthermore, the first narrow-gauge railway line in the territory of modern Latvia was stretched from Valka to Estonian city of Pärnu.

On 15 November 1917 the decision of the Latvian Provisional National Council to proclaim the independent Republic of Latvia was made in Valka.